Car-ventilator.



J. GREENBURG.

CAR VENTILATOB APPLIOATION FILED JAN. 31, 1911.

Patented May 23, 1911.

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55 h and provided with a frame 3 Secured within UNITED STATES PATENT OFFICE.

JOSEPH GREENBURG, OF BOSTON, MASSACHUSETTS.

CAR-VENTILATOR.

To all whom it may concern:

Be it known that I, J OSEPH GREENBURG, a citizen of the United States, and resident of Boston, County of Sufiz'olk, and State of Massachusetts, have invented an Improve- V ment in Car-Ventilators, of which the folc Currents of air obtainable from the movement of the car.

The ventilator is of that type which comprises a casing mounted upon and opening into the side of the car near the top thereof.

It'comprises separate means for withdrawing the vitiated air from the car and for supplying fresh air thereto. It is also so constructed as not materially to interfere with the illumination of the car by exterior light.

These and other features of the .invention will appear from the accompanying description and drawings and will be more particularly pointed out in the appended claims.

The drawings `represent a preferred form of the invention shown as connected to the wall of a car.

' In the drawings, Figure 1 is a vertical central section of the device and a portion of the wall of the car; Fig. 2 is a plan View of the Construction shown in Fig. 1, chiefly in cross section, the'left hand portion of the figure being'shown as a section on the Eneas-w of Fig. 1, and the right hand portion of the figure being shown as a section on the line y-y of Fig. 1.

The wall of the car is shown at l provided with a rectangular opening to receive the ventilator, and this opening is arranged on the side of the car so that the ventilator protrudes therefrom and extends, parallel with the line of movement of the car.

The ventilator may be of any suitable material but is preferably constructed as shown of sheet metal. Its general body' portion may properly be described as a casing, and this casing is provided at one side with a rectangular opening to fit the opening in the wall of the car. In the drawings, the casing at the opening is flanged, as shown at 2,

Specification of Letters Patent.

Application filed January 31, 1911.

Patented May'23, 1911.

Serial No. 605,685.

the opening of the car. In its general shape the casing is rectangular, its upper portion 4 having a generally cylindrical form.

A door 5 is mounted centrally in the opening of the casing to swing on a horizontal pivot 6. This door is transparent and for that purpose is shown as having a large pane of glass 7 inserted therein. The door when in its Vertical position closes the opening in the casing and when tilted on its pivot serves to separate the upper and lower portions of the interier of the casing. The lower portion of the casing is formed with inclned walls 8 extending from the edge of the opening to the ends of the casing, and shelves or walls 9 at the ends of the casing serve further to define the lower portion of the casing.

A tube 10 extends through the upper part of the casing and is provided with flaring ends 11. This tube is preferably closed at its bottom so that any rain or snow carried therein will pass therethrough Without falling into the casing and thence into the car, and open through a material portion of its length. In the drawings it is shown as formed throughout a portion of .its periphery of foraminated material, such as the wire netting 12.

Rectangular openings are formed in each end of the lower portion of the casing. These openings extend from the inclined walls 8 to the outer wall of the casing and from the bottom of the casing up to the horizontal walls 9. Curved deflecting blades 13 are secured at 14, that is, at the inner edge of the openings to the casing and project well out beyond the outer wall of the casing. Preferably, these blades are pivotally mounted at 14 and are adjustable automatically, or otherwise, and in coperation therewth doors 15 for the openings at the ends of the casing may be provided. These doors are pivoted at 16 and Swing back against stops 17. The doors may be connected directly to the curved blades by means of links 18, and some means must be provided for maintaining the doors normally open against the air pressure. Such means are llustrated as the springs 19 carried on the door hinge. Preferably, the openings at the' ends of the lower portion ofthe casing are closed by foraminated material, such as the wire netting 20.

The exterior wall of the casing is made transparent, as shown, by means of a large ject is to remove the vitiated air which accumulates at the top of the car andto supply to the car a constant stream of fresh ar in a quiet manner without producing a strong draft. The door 5 may be tipped to difierent positions on its pivot and serves to regulate or control the ventilation of the car by opening or closing to a greater eXtent the opening from the ventilator into the car.

The ventilator is symmetrically constructed so as to have the same action in whichever direction the car moves. For the purpose of further eXplanation let it be assumed that the car is moving in the direction of the arrow B in Fig. 2. Under these circumstances, the air will enter the left hand fiaringend ofthe tube 10, as indicated by arrow C, and being drawn into the comparatively narrow tube will pass therethrough with great rapidity, thus producing suction in the upper part of the casing through the foraminated portion of the tube. The vitiated air from the car naturally rises, and drawn by suction in the tube will pass over the door 5 and into the tube 10, as indicated by arrows D, and is thus carried away out of the right hand end of the tube. Meanwhle the motion of the car likewise causes the air to strike the right hand defiector blade 13, as indicated by arrow E. This air will at once be broken up and defiected by the blade 13 through the opening in the end of the casing, between the door 15 and the inclined wall 8, and beneath the shelf 9 through the lower portion of the casing beneath the door 5 and downward into the car. The sudden change in the direction of the current of air, caused by the deflector 13, and the movement of the current of air slightly in the opposite direction and downward into the car causes it to enter in a quiet and steady stream without producing a strong draft. Preferably, the defiector 13 is pivotally mounted at let; is connected to the door, as shown, by the link 18, and the spring 19 is so arranged that the defiector and door act automatically together and regulate the effective size of the opening into the casing in accordance with the air pressure upon the deflector blade '13, thus insuring a proper and even supply of fresh air to the car.

Having fully described my invention what I claim as new and desire to secure by Letters Patent is: i

1. A car ventilator comprising a casing open at its side and adapted to be secured to and open into the side of the car, means for separating the lower and upper, portions of said casing at said opening a partially open tube extending through the upper part of said casing and provided with flarng ends, openings at each end of said casing into the lower portion thereof, defiector blades in front of said openings with their free ends extending beyond the outer wall of the casing whereby, upon the movement of the car in either direction, the air rushing through the tube will suck the vitiated air through the upper portion of 'the casing into and out through the tube and the air striking against one of the defiector blades' will be guided thereby into and through the lower portion of the casing down into the car.

2. A car ventilator comprising a casing open at its side and adapted to be secured to and open into the side of the car, a door for said opening mounted centrally on a horizontal pivot therein and separatingrthe lower and upper portions of said casing at said opening, a partially open tube extending through the upper part of said casing and provided with fiaring ends, openings at each end of said casing into the lower portion thereof, deflector blades in front of said openings with their free ends eXtending beyond the outer wall of the casing whereby, upon the movement of the car in either direction, the air rushing through the tube will suck the vitated air through the upper portion'of the casing into and out through the tube and the air striking 'against one of the defiector blades will be guided thereby into and through the lower portion of the casing down into the car.

3. A carventilator comprising a casing open at its side and adapted to be secured to and open into the side of the car, a transparent door for said opening mounted centrally on a horizontal pivot therein and separating the lower and upper portions of said casing at said opening, a partially open tube extending through the upper part of said casing and provided with fiaring ends, openings at each end of said casing into the lower portion thereof, deflector blades in front of said openings with their free ends extending beyond the outer wall of the casing whereby, upon the movement of the car in either direction, the air rushing through the tube will suck the vitiated air through lower and upper portions of said casing at said opening, a partially open tube extending through the upper part of said casing and provided with flaring ends openings at each end of said casing into the lower portion thereof, deflector blades in front of said openings with their free ends extending beyond the outer wall of the casing whereby, upon the movement of the car in either direction, the air rushing through the tube will suck the vitiated air through the upper portion of the oasing into and out through the tube and the air striking against one of the deflector blades will be guided therehy into and through the lower portion of the casing down into the car.

5. A car ventilator com rising a casng open at its side and adapte to be Secured to and open into the side of the car, means for separating the lower and upper portions of said casing at said opening, a partially open tube extending through the upper part of said casing and provided with flaring ends, openings at each end of said casing into the lower portion thereof, doors for said openings, pivotally mounted, deflector blades in front of said openings with their free ends extending beyond the outer wall of the casing, connections between said doors and said deflector blades, and means for counteracting the closing movement of said doors whereby, upon the movement of the car in either direction, the air rushing through the tube will suck the vitiated air through the upper portion of the casing into and out through the tube and the air striking against one of the deflector blades will be guided thereby into and through the lower portion of the casing down into the car.

6. A car ventilator comprising a casing open at its side and adapted to be Secured to and open into the side of the car, a door for said opening mounted centrally on a horizontal pivot therein, a tube extending through the upper part of said casin provided with flaring ends and partiali y foraminated, openings at each end of said casing into the lower portion thereof, springcontrolled curved deflector blades pivoted to said casing and extending past said openings with their free ends projecting beyond the outer wall of the casing whereby, upon the movement of the car in either directon, the vitiated air will be drawn out through said tube and pure air Will be fed in through the lower portion of the casing.

7. A car ventilator comprsing a casng open at its side and adapted to be Secured to and open into the side of the car, means for separating the lower and upper portions of said casing at said opening, a partially open tube extending throu h the upper part of said casing and provi ed with flarng ends, openings at each end of said casing into the lower portion thereof, doors for said openings, walls in said casing immediately above sad doors, pivotally mounted, deflector blades in front of said openings with their free ends extending beyond the outer wall of the casing, connections between said doors and said deflector blades, and means for counteracting the closing movement of said doors whereby, upon the movement of the car in either direction, the air rushing through the tube will suck the vitiated air through the upper portion of the casing into and out through the tube and the air striking against one of the deflector blades will be guided thereby into and through the lower portion of the casing down into the car.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

J OSEPH GREENBURG. witnesses:

NATHAN HEARD, LEONA CHANDLER.

copies of this patent may be obtained for five cents each, by addressing the commissioner of Patents, Washington, D. C." 

